[Bug fortran/102901] New: ICE (segfault) when compiling pdt_13.f03 with -fcheck=all in gfc_check_pdt_dummy -> structure_alloc_comps

[Bug fortran/102901] New: ICE (segfault) when compiling pdt_13.f03 with -fcheck=all in gfc_check_pdt_dummy -> structure_alloc_comps

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102901

            Bug ID: 102901
           Summary: ICE (segfault) when compiling pdt_13.f03 with
                    -fcheck=all in gfc_check_pdt_dummy ->
                    structure_alloc_comps
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: burnus at gcc dot gnu.org
  Target Milestone: ---

Existing pdt_13.f03, pdt_14.f03 and pdt_15.f03 fail when compiled with
-fcheck=all

structure_alloc_comps:
9998            case CHECK_PDT_DUMMY:
9999
10000             comp = fold_build3_loc (input_location, COMPONENT_REF, ctype,
10001                                     decl, cdecl, NULL_TREE);

->

#1  0x0000000000be7ba7 in fold_build3_loc (loc=287456,
code=code@entry=COMPONENT_REF, type=type@entry=0x7ffff6fc15e8,
op0=op0@entry=0x7ffff66cdd00, op1=op1@entry=0x7ffff719c2f8, op2=op2@entry=0x0)
    at ../../repos/gcc-trunk-commit/gcc/fold-const.c:13813
13813     tem = fold_ternary_loc (loc, code, type, op0, op1, op2);

(gdb) p code
$16 = COMPONENT_REF

(gdb) p debug_tree(type)
Cannot access memory at address 0x7ffffbffecef
(gdb) p debug_tree(op0)
Cannot access memory at address 0x7ffffbffecef
(gdb) p debug_tree(op1)
Cannot access memory at address 0x7ffffbffecef
(gdb) p debug_tree(op2)
Cannot access memory at address 0x7ffffbffecef

Going up in the calltree:

10009                 tmp = gfc_check_pdt_dummy (c->ts.u.derived, comp,
10010                                            c->as ? c->as->rank : 0,
10011                                            pdt_param_list);

(gdb) p *c->ts.u.derived
$19 = {name = 0x7ffff716ee10 "Pdtlink_8", module = 0x7ffff716ede0 "link_module"
(gdb) p c->as
$20 = (gfc_array_spec *) 0x0
(gdb) p pdt_param_list 
$21 = (gfc_actual_arglist *) 0x2a4b070
(gdb) p *pdt_param_list 
$22 = {name = 0x7ffff716edf0 "real_kind", label = 0x0, missing_arg_type =
BT_UNKNOWN, spec_type = SPEC_EXPLICIT, expr = 0x2acfce0, next = 0x0}

[Bug fortran/102901] ICE (segfault) when compiling pdt_13.f03 with -fcheck=all in gfc_check_pdt_dummy -> structure_alloc_comps

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102901

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-10-23
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.

[Bug fortran/102901] ICE (segfault) when compiling pdt_13.f03 with -fcheck=all in gfc_check_pdt_dummy -> structure_alloc_comps

[kargl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102901

kargl at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kargl at gcc dot gnu.org

--- Comment #2 from kargl at gcc dot gnu.org ---
(In reply to Tobias Burnus from comment #0)
> Existing pdt_13.f03, pdt_14.f03 and pdt_15.f03 fail when compiled with
> -fcheck=all
> 

PDT are so badly broken any additional PR involving -fcheck is of little use.
At last count, there were 33 open PRs about PDT.

[Bug fortran/102901] ICE (segfault) when compiling pdt_13.f03 with -fcheck=all in gfc_check_pdt_dummy -> structure_alloc_comps

[pault at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102901

Paul Thomas <pault at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pault at gcc dot gnu.org
             Blocks|                            |82173

--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Added to PDT meta-bug


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
[Bug 82173] [meta-bug] [PDT] Parameterized derived type errors